Shower system



FIG. 1 is a front/left side perspective view of a shower system;

FIG. 2 is a front/right side perspective view of the shower system of FIG. 1;

FIG. 3 is a front elevation view of the shower system of FIG. 1; and,

FIG. 4 is a top plan view of the shower system of FIG. 1.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a shower system, as shown and described. 